We address the problem that dynamical masses of high-redshift massive galaxies, derived using virial scaling, often come out lower than stellar masses inferred from population fitting to multi-band photometry. We compare dynamical and stellar masses for various samples spanning ranges of mass, compactness and redshift, including the SDSS. The

Context. Blue compact galaxies (BCG) are gas-rich, low-luminosity, low-metallicity systems that undergo a violent burst of star formation. These galaxies offer us a unique opportunity to investigate collective star formation and its effects on galaxy evolution in a relatively simple environment. Spatially resolved spectrophotometric studies of BCGs

We present first relevant results from our survey to search multiplicity in T Tauri systems and its relation with disk presence and planet formation on these young stars. This very high spatial resolution survey is being developed with Lucky Imaging techniques using the instruments FastCam and AOLI at the Observatorios de Canarias. Although still

La Cámara Plenóptica es un concepto que proviene del campo de la fotografía computacional, y que surge como herramienta para capturar una cantidad aprovechable de muestras de la Función Plenóptica, o ¿Light Field¿. Esta función, de cuatro variables espaciales que recorren la apertura y el plano focal de un sistema óptico que genera imagen

Subsolar metallicity L subdwarfs was discovered over a decade ago, but remain poor understood due to lack of known objects. We started to search for L subdwarfs since a few years ago and have increased the number of known L subdwarfs from 23 to 57. We are following up 33 L subdwarfs with X-shooter on the Very Large Telescope. We are also measuring

The oxygen abundance in the solar photosphere, and consequently the solar metallicity itself, is still a controversial question with far-reaching implications in many areas of astrophysics. This paper presents a new determination obtained by fitting the forbidden O i line at 6300 Å with an observational 3D model. The approach presented here is